Skat maniac, or otherwise just used to refer to someone as a noob player at online games.

Room mate #1: "Hey, what are you watching?"
Room mate #2: "Oh, you said you weren't going to come back until after 9?"
Room mate #1: "Yeh well it closed ear- OH WHAT THE HELL?"
Room mate #2: "Look calm down"
Room Mate #1: "OH, NO. NO THAT IS TOO FAR, YOU ARE SUCH A SKATANIC"
Room Mate #2: "Care face tbh"